MASSICOT
Specimen mas-2

Dims: 1.3 x 0.8 x 0.5" (3.2 x 2.0 x 1.2 cm)

Wt: 0.4 oz. (11 g)

Tonopah-Belmont Mine, Maricopa County, Arizona, U.S.A.

Crusts of powdery Massicot partly coat the dark base material of this thumbnail piece. Like most such specimens, damage cannot be determined because no actual crystals are present. The Massicot ranges in coloration from a dull orange to a dull, dirty yellow coloration and has a uniform, matte luster. There may possibly be a quantity of litharge (another lead oxide with an identical chemistry but a different crystal structure) present, but sensitive equipment would be needed to detect it. The specimen is affixed inside a plastic thumbnail box with a removable putty.

Dims:1.3x1.1x0.4" (3.3x2.8x1.0 cm)

Wt: 0.8oz. (24g)

Fitz Mine, Near Lone Pine, California

The face of this specimen is covered with a spongy coating of earthy massicot. No crystals are evident. There is a small amount of an unidentified brownish-black mineral associated with the massicot. There is no damage to this specimen.